Effect of symmetry reduction on the spin dynamics of (001)-oriented GaAs quantum wells

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English, D.J.; Hübner, J.; Eldridge, P.S.; Taylor, D.; Henini, M. et al.: Effect of symmetry reduction on the spin dynamics of (001)-oriented GaAs quantum wells. In: Physical Review B - Condensed Matter and Materials Physics 87 (2013), Nr. 7, No. 75304. DOI: https://doi.org/10.1103/PhysRevB.87.075304

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Abstract: 
Spin quantum beat spectroscopy is employed to investigate the in-plane anisotropy of the spin dynamics in (001) GaAs/AlGaAs quantum wells induced by an external electric field. This technique allows the anisotropy of the spin relaxation rate Γs and the electron Landé g factor g* to be measured simultaneously. The measurements are compared to similar data from (001) GaAs/AlGaAs quantum wells with applied shear strain and asymmetric barrier growth. All of these operations act to reduce the symmetry compared to that of a symmetric (001) quantum well in an identical manner (D2d → C2v). However, by looking at the anisotropy of both Γs and g* simultaneously we show that the microscopic actions of these symmetry breaking operations are very different. The experiments attest that although symmetry arguments are a very useful tool to identify the allowed spin dependent properties of a material system, only a microscopic approach reveals if allowed anisotropies will manifest. © 2013 American Physical Society.
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Document Type: article
Publishing status: publishedVersion
Issue Date: 2013
Appears in Collections:Fakultät für Mathematik und Physik

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pos. country downloads
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1 image of flag of Germany Germany 36 81.82%
2 image of flag of United States United States 2 4.55%
3 image of flag of China China 2 4.55%
4 image of flag of Russian Federation Russian Federation 1 2.27%
5 image of flag of Japan Japan 1 2.27%
6 image of flag of United Kingdom United Kingdom 1 2.27%
7 image of flag of Czech Republic Czech Republic 1 2.27%

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